Cholera
Cases: 470,00
Deaths: 6,631
Location: Haiti 2010
Transmission: Drinking water or eating food contaminated with bacteria
Symptoms: Often mild or without symptoms, but can include profuse diarrhea, vomiting, leg cramps and dehydration
Incubation period: A few hours to 5 days

Polio Cases: 58,000
Deaths: 3,145
Location: United States 1952
Transmission: Spread by virus from person to person
Symptoms: Most people show no symptoms, but can develop fever, fatigue, aches, flu-like symptoms, stiffness in the neck and back and pain in the limbs
Incubation period: 7-10 days